Flow device and associated method and system

ABSTRACT

A flow device, method, and system are provided for determining the fluid particle composition. An example flow device includes a fluid sensor configured to monitor at least one particle characteristic of fluid flowing through the fluid sensor. The example flow device also includes at least one processor configured to, upon determining the at least one particle characteristic satisfies a particle criteria, generate a control signal for an external device. The example flow device also includes a fluid composition sensor configured to be powered based on the control signal and further configured to capture data relating to the fluid particle composition. The example flow device is also configured to generate one or more particle profiles of at least one component of the fluid based on the data captured by the fluid composition sensor.

TECHNOLOGICAL FIELD

An example embodiment relates generally to devices used to trigger theimage acquisition system of a fluid composition sensor and theassociated method of controlling the trigger devices and, moreparticularly, to triggering devices based on determining the fluidparticle composition.

BACKGROUND

Sensors are used in various environments to monitor air conditions. Someenvironments require sophisticated monitoring that necessitatesidentifying airborne particles by collecting and imaging those particleswithin a sensor, such as a field portable microscope. The analysis ofthe microscopic image performed by a human or automatically bysophisticated image analysis software. This analysis is timeconsumptive; therefore constant monitoring is not preferred. It isadvantageous to only perform the image analysis after a statisticallyrelevant number of particles have accumulated in the imaged area. Thevarying amount of particles present in air at any time and location,makes simple timing mechanisms unable to reliably predict when arelevant number of particles have accumulated. Various current fieldportable microscopes are configured to activate and monitor the air atregular intervals. Applicant has identified a number of deficiencies andproblems associated with these current sensors. For example, thecomposition of the air can change dramatically between intervals, andtherefore defined intervals may be unable to fully characterize thecontent of the air. Through applied effort, ingenuity, and innovation,many of these identified problems have been solved by the methods,systems, and flow devices of the present disclosure.

BRIEF SUMMARY

The following presents a simplified summary in order to provide a basicunderstanding of some aspects of the present disclosure. This summary isnot an extensive overview and is intended to neither identify key orcritical elements nor delineate the scope of such elements. Its purposeis to present some concepts of the described features in a simplifiedform as a prelude to the more detailed description that is presentedlater.

In an example embodiment, a method is provided for controlling a flowdevice. The method includes monitoring, via a fluid sensor, signalpulses received by the fluid sensor based upon the presence of one ormore particles carried by fluid flowing through the fluid sensor. Themethod also includes generating a control signal for an external deviceupon determining that the signal pulses satisfy one or more particlecriteria. The one or more particle criteria defines at least one of athreshold number of signal pulses indicative of the presence of one ormore particles received by the fluid sensor or a threshold size of atleast one signal pulse received by the fluid sensor.

In some embodiments, the monitoring of the fluid sensor is continuous.In some embodiments, the method also includes causing a fluidcomposition sensor to be powered based on the control signal. The methodfurther includes capturing, via the fluid composition sensor, datarelating to the fluid particle composition. The method still furtherincludes generating one or more particle profiles of at least onecomponent of the fluid based on the data captured by the fluidcomposition sensor. In some embodiments, the fluid sensor is an opticalscanning device. In some embodiments, the fluid sensor is an opticalscanner and the fluid composition sensor is a lens free microscopedevice.

In some embodiments, the fluid sensor defines at least a portion of afluid flow path, and wherein the fluid sensor and the fluid compositionsensor are positioned along the fluid flow path such that the fluidflows through the fluid sensor before reaching the fluid compositionsensor. In some embodiments, the method also includes causing the fluidcomposition sensor to be powered off after the one or more particleprofiles have been generated.

In some embodiments, the one or more particle profiles includes at leastone of a holographic image reconstruction or particle size data. In someembodiments, the method also includes determining an initial particleprofile based on the monitoring by the fluid sensor. In someembodiments, each of the one or more particle profiles comprises atleast one of particle images, particle size data, or particle type dataof the at least one component of the fluid. In some embodiments, each ofthe at least one component of the fluid comprises one or more ofbacteria, viruses, pollen, spores, molds, biological particles, soot,inorganic particles, and organic particles.

In some embodiments, generating the one or more particle profiles of atleast one component of the fluid based on the data captured by the fluidcomposition sensor includes comparing one or more partial image frameswith one or more reference image frames of one or more potentialcomponents of the fluid. In some embodiments, the fluid sensor and thefluid composition sensor are contained in a housing.

In another example embodiment, a flow device is provided for detectingfluid particle composition. The flow device includes a fluid sensorconfigured to monitor signal pulses received by the fluid sensor basedupon the presence of one or more particles carried by fluid flowingthrough the fluid sensor. The fluid sensor is also configured togenerate a control signal for an external device upon determining thatthe signal pulses satisfy one or more particle criteria. The one or moreparticle criteria defines at least one of a threshold number of signalpulses indicative of the presence of one or more particles received bythe fluid sensor or a threshold size of at least one signal pulsereceived by the fluid sensor.

In some embodiments, the monitoring of the fluid sensor is continuous.In some embodiments, the flow device includes a fluid compositionsensor. The flow device is also configured to cause the fluidcomposition sensor to be powered based on the control signal. The flowdevice is also configured to capture, via the fluid composition sensor,data relating to the fluid particle composition. The flow device is alsoconfigured to generate one or more particle profiles of at least onecomponent of the fluid based on the data captured by the fluidcomposition sensor. In some embodiments, the fluid sensor is an opticalscanning device. In some embodiments, the fluid sensor is an opticalscanner and the fluid composition sensor is a lens free microscopedevice.

In some embodiments, the fluid sensor defines at least a portion of afluid flow path, and wherein the fluid sensor and the fluid compositionsensor are positioned along the fluid flow path such that the fluidflows through the fluid sensor before reaching the fluid compositionsensor. In some embodiments, the flow device is also configured to causethe fluid composition sensor to be powered off after the one or moreparticle profiles have been generated.

In some embodiments, the one or more particle profiles includes at leastone of a holographic image reconstruction or particle size data. In someembodiments, the flow device is also configured to determine an initialparticle profile based on the monitoring by the fluid sensor. In someembodiments, each of the one or more particle profiles comprises atleast one of particle images, particle size data, or particle type dataof the at least one component of the fluid. In some embodiments, each ofthe at least one component of the fluid comprises one or more ofbacteria, viruses, pollen, spores, molds, biological particles, soot,inorganic particles, and organic particles.

In some embodiments, generating the one or more particle profiles of atleast one component of the fluid based on the data captured by the fluidcomposition sensor includes comparing one or more partial image frameswith one or more reference image frames of one or more potentialcomponents of the fluid. In some embodiments, the fluid sensor and thefluid composition sensor are contained in a housing.

In still another example embodiment, a system is provided fordetermining the fluid particle composition flowing through a path. Thesystem includes a fluid sensor configured to monitor at least oneparticle characteristic of a fluid flowing through the fluid sensor andalong the path. The system also includes a fluid composition sensorconfigured to capture data relating to at least one particlecharacteristic of the fluid flowing along the path, wherein the fluidcomposition sensor is located downstream of the fluid sensor along thepath. The fluid composition sensor remains unpowered until a particlecriteria is satisfied by the fluid flowing through the fluid sensor. Thesystem further includes at least one processor configured to generateone or more particle profiles of at least one component of the fluidbased on the data captured by the fluid composition sensor.

In some embodiments, the monitoring of the fluid sensor is continuous.In some embodiments, the fluid sensor is an optical scanner device. Insome embodiments, the fluid composition sensor is a lens free microscopedevice. In some embodiments, the fluid composition sensor is configuredto be powered off after the one or more particle profiles have beengenerated. In some embodiments, each of the at least one component ofthe fluid comprises one or more of bacteria, viruses, pollen, spores,molds, biological particles, soot, inorganic particles, and organicparticles. In some embodiments, the fluid sensor and the fluidcomposition sensor are contained in a housing.

The above summary is provided merely for purposes of summarizing someexample embodiments to provide a basic understanding of some aspects ofthe invention. Accordingly, it will be appreciated that theabove-described embodiments are merely examples and should not beconstrued to narrow the scope or spirit of the invention in any way. Itwill be appreciated that the scope of the invention encompasses manypotential embodiments in addition to those here summarized, some ofwhich will be further described below.

BRIEF DESCRIPTION OF THE DRAWINGS

Having thus described certain example embodiments of the presentdisclosure in general terms, reference will hereinafter be made to theaccompanying drawings, which are not necessarily drawn to scale, andwherein:

FIG. 1 is a schematic diagram of a fluid sensing system in accordancewith an example embodiment of the present disclosure;

FIG. 2 is an illustrative flowchart of the operations of a flow devicein accordance with an example embodiment of the present disclosure;

FIG. 3A is an exterior view of a fluid sensor in accordance with anexample embodiment of the present disclosure;

FIG. 3B is multiple views of a fluid sensor in accordance with anexample embodiment of the present disclosure;

FIG. 4 is a cutaway view of a fluid sensor in accordance with an exampleembodiment of the present disclosure;

FIG. 5 is a cutaway view of a lens free microscope device in accordancewith an example embodiment of a fluid composition sensor of the presentdisclosure; and

FIG. 6 is a cutaway view of a flow device with a fluid sensor and afluid composition sensor in accordance with an example embodiment of thepresent disclosure.

DETAILED DESCRIPTION

Some embodiments will now be described more fully hereinafter withreference to the accompanying drawings, in which some, but not all,embodiments are shown. Indeed, various embodiments may be embodied inmany different forms and should not be construed as limited to theembodiments set forth herein; rather, these embodiments are provided sothat this disclosure will satisfy applicable legal requirements. As usedherein, a “fluid” may be embodied as a gas, a liquid, or a combinationof a gas and a liquid in a single flow. Thus, the term “fluid”encompasses various materials subject to flow, such as, but not limitedto, liquids and/or gases (e.g., air, oil, or the like). Thus, variousembodiments are directed to fluid sensing systems, such as gas sensingsystems (e.g., certain embodiments being specifically configured foroperation with air; other embodiments being configured for operationwith other gases, such as inert gases, volatile gases, and/or the like),liquid sensing systems, and/or the like.

Certain embodiments are directed to a fluid sensing system, a flowdevice, and a method of controlling a flow device for use in variousenvironments. Because certain complex fluid sensors for monitoring fluidparticle composition are not viable to operate continuously (e.g.,complex air sensors are often both time and power intensive). Whiletime-based activation—powering on the sensor at a set interval of timebefore depowering—may result in inaccurate, unreliable, or otherwiseunrepresentative fluid particle composition testing results that do notreflect the true composition of the fluid (e.g., a volume of air) beingmonitored. For example, quantities of particulates within air thatcollectively embody the air's composition, such as pollen, can changerapidly and unpredictably over even a short period of time. Thus,monitoring the fluid particle composition only at defined time intervalsmay result in monitoring results that entirely omit drastic changes inthe fluid's composition (e.g., drastic increases or decreases in theamount of pollen, or other particulates, in the air). Conversely, whenthe fluid particle composition remains relatively constant, the sensormay be powered on multiple times without any changes in measured fluidparticle composition, which may result in a waste of energy ininitializing the sensor to take such measurements. To overcome suchdifficulties, incorporating a front-end discriminating fluid sensorhaving near real-time detection and minimal power consumptionrequirements while providing continuously monitoring of the fluid allowsfor a reduction in overall energy consumption, while also increasing thereliability of the sensing system as a whole.

Referring now to FIG. 1, a schematic diagram of an example system 10configured for fluid sensing is provided. The system 10 may include, beassociated with, or may otherwise be in communication with a processingcircuitry 12, including, for example, one or more processors 14 and oneor more memory devices 16, a fluid sensor 20, a fluid composition sensor22, and an image database 28. In various embodiments, the system 10 maybe embodied by or associated with a plurality of computing devices thatare in communication with or otherwise networked with one another. Forexample, one or both of the fluid sensor and the fluid compositionsensor may have a processor in communication with the other. In variousembodiments, some or all of the referenced components may be embodied asa flow device. For example, a flow device may include a processor 14, afluid sensor 20, and, optionally, a fluid composition sensor 22. Invarious embodiments, the system 10 may be configured with, or incommunication with, an image database 28. In some embodiments, the imagedatabase 28 may be stored, at least partially on the memory device 16 ofthe system. In some embodiments, the image database 28 may be remotefrom, but in connection with, the system 10. The image database 28 maycontain information, such as images relating to one or more potentialcomponents of fluids. In some embodiments, the image database 28, and/orother similar reference databases in communication with the system 10,may comprise non-image information used to identify particles (e.g., forflorescent particles, a spectrometer may be used by the fluidcomposition sensor 22 discussed below and the system 10 may receivespectrum information to identify and/or classify the particles). In someembodiments, the system 10 may also use machine learning for identifyingand/or classifying particles, such that the system 10 may use areference database, such as image database 28, to initially train thesystem 10 and then may be configured to identify and/or classifyparticles without referencing the image database 28 or other referencedatabases (e.g., a system may not be in active communication with theimage database 28 during regular operations).

The fluid sensor 20 may be embodied as an air sensor comprising aparticle detector comprising a light beam generator and a pulsedetector, collectively configured to monitor signal pulses generated atthe pulse detector based upon the presence of one or more particlescarried by air flowing through the air sensor. The fluid sensor 20 maybe configured as any fluid sensor capable of monitoring particlecomposition at or near real-time. In various embodiments, the fluidsensor 20 may be configured as an optical scanner. For example, incertain embodiments, the fluid sensor 20 may be embodied as an airsensor comprising a Honeywell HPM Series Particulate Matter Sensor, incombination with a processor configured for generating control signalsas discussed herein. Referring now to FIGS. 3A and 3B, the fluid sensor20 may be embodied as an air sensor have a casing 320 configured withone or more intake slots 310 and one or more exhaust slots 315configured such that the air enters the fluid sensor 20 through the oneor more intakes slots 310. As will be discussed in reference to FIG. 4,the air travels through the fluid sensor 20 and exits through one ormore exhaust slots 315. In some embodiments, the fluid sensor 20 may beconfigured with an electrical connector port 305 configured to transmitelectrical signals and/or data signals (e.g., control signals) to and/orfrom the fluid sensor (e.g., the electrical signal may comprise a powersignal provided from an external power source to the fluid sensor,and/or a data signal may comprise data indicative of detectedcharacteristics of the fluid flowing through the sensor, the data signalmay be transmitted from the fluid sensor to another system component).In some embodiments, the fluid sensor 20 may be powered through theelectrical connector port 305. Alternatively, the fluid sensor 20 may bebattery powered. In some embodiments, some or all of the processor(s) 14associated with the fluid sensor 20 may be contained in the casing 320.In some embodiments, the electrical connector port 305 may connect thefluid sensor 20 to at least a portion of the processor(s) 14 associatedwith the fluid sensor. In some embodiments, the control signal createdbased on the fluid travelling through the fluid sensor 20 may betransmitted through the electrical connector port 305. In variousembodiments, the fluid sensor 20 may be relatively small in comparisonto the fluid composition sensor 22. For example, the fluid sensor may beless than 2 inches wide by 2 inches long by 1 inch thick. In someembodiments, the fluid sensor 20 may be larger or smaller based on thesize of the components used and the use of the sensing system. Forexample, the system 10 may be packaged in a flow device, such that theflow device may be portable from one environment to another.

As shown in FIG. 4, the fluid sensor 20 may be an optical scanningdevice. In some embodiments, the fluid sensor 20 may be equipped with abeam generator, such as the illustrated illumination source 410 and apulse detector, such as the illustrated photodiode element 405, each ofwhich may be positioned within a detection cavity of the fluid sensor 20that is positioned within the fluid flow path extending through thefluid sensor 20 (e.g., positioned within an air flow path of an airsensor). Additionally, the fluid sensor 20 may be configured with aphotoelectric converter 415. In various embodiments, the illuminationsource may be a laser, lamp, light-emitting diode (LED), or the like,which may operate in connection with one or more lenses collectivelyconfigured to generate a light beam (e.g., ultraviolet, visible,infrared, or multiple color light) directed across the fluid flow pathpassing through the detection cavity of the sensor. Specifically, thelight beam may be detected across the fluid flow path, from theillumination source 410 to a light trap configured to absorb light tominimize the amount of light reflected off of components of the fluidsensor 20 and back toward the fluid flow path (which may inaccuratelyduplicate some measurements of air characteristics). For example, thefluid sensor 20 may be configured to use laser-based light scatteringparticle sensing for detecting particles within air.

In an example embodiment, the fluid sensor 20 may be configured with afan 425 used to draw air into the fluid sensor inlet 310 and through thefluid sensor. In some embodiments, the fluid may flow through adetection cavity enclosing the illumination source 410 (e.g., laser,lamp, LED, or the like) such that particles or other attributes of thefluid flow may reflect at least a portion of the light generated by theillumination source 410, thereby enabling the photodiode element 405 tocapture the pulses of light that are reflected off of the particles inthe fluid. In some embodiments, the photodiode element 405 may transmitinformation indicative of the light reflected off of the particles inthe fluid to the photoelectric converter 415. In some embodiments, thephotoelectric converter 415 is configured to generate a control signalfor an external device based at least in part on data received from thephotodiode element 405, for example, when a particle criteria issatisfied.

In certain embodiments, a particle criteria may be a minimum number ofdetected particles per volume of fluid, a minimum number of particlesdetected during a defined time period, a maximum number of particlesdetected per volume of fluid, a maximum number of particles detectedduring a defined time period, a minimum particle size, a minimum numberof particles having a minimum and/or maximum particle size, and/or thelike. In some embodiments, the particle criteria may be a thresholdnumber of signal pulses indicative of the presence of one or moreparticles received by the fluid sensor 20 (specifically, signal pulsesgenerated at the photodiode element). In some embodiments, the particlecriteria may be a threshold size of at least one signal pulse receivedby the fluid sensor 20. In some embodiments, the particle criteria maybe either a threshold number of signal pulses indicative of the presenceof one or more particles received by the fluid sensor or a thresholdsize of at least one signal pulse received by the fluid sensor. In someembodiments, the criteria may be a set number of fluorescent particlesand/or the ratio of fluorescent particles to non-fluorescent particles.In various embodiments, the external device may be the fluid compositionsensor 22 or an associated processor 14. The fluid sensor 20 may beconfigured to transmit the control signal to the external device, suchas through the connector 305.

The fluid composition sensor 22 may be configured to capture datarelating to the fluid particle composition, such that one or moreparticle profiles of at least one component of the fluid may begenerated based on the data captured by the fluid composition sensor. Incertain embodiments, the fluid composition sensor 22 may have one ormore illumination source, such as laser, lamp, LED, and/or the like. Insome embodiments, the illumination source of the fluid compositionsensor 22 may be larger than the illumination source of the fluid sensor20, such that the illumination source of the fluid composition sensor 22uses more electrical power than the illumination source 410 of the fluidsensor 20. In some embodiments, the fluid composition sensor 22 may beconfigured to capture data relating to one or more particles in fluid.In some embodiments, the fluid composition sensor 22 may be configuredto capture data relating to a plurality of particles in the fluidsimultaneously. For example, the fluid composition sensor 22 may have adesignated field of view for capturing, permanently and/or temporarily,multiple particles simultaneously. In some embodiments, the fluidcomposition sensor 22 may be configured specifically for operation indetecting particular characteristics with a defined range of particleswithin a field of view thereof, such that the system 10 may beconfigured to generate the control signal when the amount of particlesis within a certain range appropriate for the fluid composition sensor22. In such an example, the particle criteria may be based on the rangeof particles. For example, the amount of pulses and/or the intensity ofthe pulses that meet the particle criteria may be based on the desiredparticle amount for the fluid composition sensor 22.

It should be understood that the configuration of the fluid compositionsensor 22 is merely an example, and various embodiments may incorporatefluid composition sensors having other configurations for detection ofcharacteristics of fluid via one or more mechanisms. For example, afluid composition sensor 22 may be configured to generate particleprofiles for a plurality of specific components. Alternatively, thefluid composition sensor 22 may be configured to generate a particleprofile for a singular component of the fluid exclusively. For example,the fluid composition sensor 22 may only generate the particle profileof pollen in the fluid when data is captured. In some embodiments, thefluid composition sensor 22 may be a lens free microscope device, suchas the one shown in FIG. 5. For example, the fluid composition sensor 22may include one or more illumination sources 50 (e.g., laser, lamp, LED,and/or the like) and an image sensor 54 configured near a transparentsubstrate 56, such that the image sensor collects images of theparticles that are collected on the transparent substrate. In someembodiments, the fluid composition sensor 22 may include a fan or vacuumpump 52 configured to pull the fluid into the fluid composition sensorthrough the fluid composition sensor intake slots 510 and through thefluid composition sensor 22. In some embodiments, the fluid compositionsensor 22 may be a lens free microscope, such as one described in WIPOPublication Number 2018/165590, incorporated herein by reference. Insome embodiments, the fluid composition sensor 22 may be embodied as aUV fluorescence system, a traditional microscope, Burkard samplers andtraps, Allergenco sampler and greased slide, and the like.

Referring now to FIG. 2, a flowchart of the method of controlling a flowdevice in accordance with an example embodiment is provided. Variousoperations discussed below may be carried out using various componentsof the system. In some embodiments, the flow device may include one ormore processors 14 and a fluid sensor 20. In some embodiments, the flowdevice may be in communication with a fluid composition sensor 22. Insome embodiments, the flow device may include a fluid composition sensor22. Various components referenced in relation to the flow device may beincluded with or in communication with the flow device.

Referring to Block 200 of FIG. 2, the flow device includes processor 14for monitoring signal pulses received by the fluid sensor 20 based uponthe presence of one or more particles carried by fluid flowing throughthe fluid sensor. As discussed above, the fluid sensor 20 may beconfigured with an illumination source, such as a laser, lamp, LED, orthe like, and a photodiode element configured to receive pulses of lightfrom the illumination source that has reflected off of the particles inthe fluid flowing through the fluid sensor 20 and onto a detectionsurface of the photodiode element. In some embodiments, the fluid sensor20 may be configured to monitor the fluid continuously. In someembodiments, the flow device may be configured to generate an initialparticle profile for one or more components of the fluid based on themonitoring of the fluid sensor 20. Additionally or alternatively, theflow device may be configured to generate an initial particle profilefor the fluid as a whole based on the monitoring of the fluid sensor 20.For example, the flow device may generate an initial particle density ofthe fluid based on the monitoring of the fluid sensor 20. In someembodiments, the fluid sensor 20 may be an optical scanner sensingdevice, such as shown in FIGS. 3A, 3B, and 4.

Referring now to Block 210 of FIG. 2, the flow device includes processor14 for generating a control signal for an external device upondetermining that the signal pulses satisfy one or more particlecriteria. In some embodiments, the particle criteria may be a thresholdnumber of signal pulses indicative of the presence of one or moreparticles received by the fluid sensor. As noted herein, the particlecriteria may be a threshold size of at least one signal pulse receivedby the fluid sensor. In some embodiments, the particle criteria may beeither a threshold number of signal pulses indicative of the presence ofone or more particles received by the fluid sensor or a threshold sizeof at least one signal pulse received by the fluid sensor. In someembodiments, the fluid sensor 20 may act as a power switch, such that nopower at all goes to the fluid composition sensor 22 until the particlecriteria is met and the control signal is generated (i.e., blocking allflow of power). In some embodiments, the fluid sensor 20 may transmitthe control signal to a central processor, and then the centralprocessor may send a signal to the fluid composition sensor 22 topower-up (i.e., fluid composition sensor 22 starts using availablepower). In some embodiments, the fluid composition sensor 22 may becontinuously powered and a central processor 14 only saves generateddata after the fluid sensor 20 detects the applicable particle criteria.

In some embodiments, the control signal may comprise an electricalsignal and/or a data signal. In some embodiments, the control signal maybe embodied as an indication to an external device that the criteria hasbeen satisfied. In some embodiments, the control signal may provide anestimate of the particle count in the fluid based on the monitoring ofthe fluid. For example, the density of the particulate in the fluidsensor may be determined and transmitted to the external device. In someembodiments, the external device may be fluid composition sensor 22and/or associated processor 14.

Referring now to Block 220 of FIG. 2, the flow device includes processor14 which is configured for causing a fluid composition sensor 22 to bepowered based on the control signal. In some embodiments, the fluidcomposition sensor 22 may be configured to remain unpowered until thecontrol signal is generated the fluid sensor. In some embodiments, thefluid composition sensor 22 may be configured to operate in a low-powermode until the control signal is generated based on the determinationthat the signal pulses satisfy one or more particle criteria. Forexample, the fluid composition sensor 22 may be powered and otherwiseoperational before a control signal is generated except for the datacapture portion of the fluid composition sensor. The control signal maybe provided to a processor 14 connected to, or otherwise incommunication with, the fluid composition sensor 22. In someembodiments, the processor in communication with the fluid compositionsensor 22 may be distinct from the processor used by the fluid sensor 20to generate the control signal. For example, the fluid sensor 20 and thefluid composition sensor 22 may each have a dedicated processor. In someembodiments, a processor 14 may be in communication with the fluidsensor 20 and the fluid composition sensor 22 and the control signal maybe an electrical signal providing power to the fluid composition sensor.

Referring now to Block 230 of FIG. 2, the flow device includes fluidcomposition sensor 22 for capturing data relating to the fluid particlecomposition. In some embodiments, the fluid composition sensor 22 may bepositioned along the fluid flow path in such a way that at least aportion of the fluid passes through the fluid sensor 20 before reachingthe fluid composition sensor 22. As discussed above in reference to thefluid composition sensor 22 discussion relating to FIG. 1, the fluidcomposition sensor 22 may include an illumination source, such as alaser, lamp, LED, or the like. In some embodiments, the illuminationsource may be configured to allow the fluid composition sensor 22 toacquire data on particles in the fluid as the particles pass through adesignated field of view of the fluid composition sensor. The datacaptured may include at least a partial image of one or more particlesin the fluid. In some embodiments, the fluid composition sensor 22 maybe a lens free microscope. In various other embodiments, the fluidcomposition sensor 22 may be embodied as a UV fluorescence system, atraditional microscope, Burkard samplers and traps, Allergenco samplerand greased slide, and the like.

Referring now to Block 240 of FIG. 2, the flow device includes processor14 for generating one or more particle profiles of at least onecomponent of the fluid based on the data captured by the fluidcomposition sensor 22. The at least one component of fluid may compriseone or more of bacteria, viruses, pollen, spores, molds, biologicalparticles, soot, inorganic particles, and/or organic particles. In someembodiments, the flow device may be configured to determine the particleprofile of one or more specific components of the fluid each time datais captured. For example, the flow device may be configured to create aparticle profile of the pollen in the air. Alternatively, the flowdevice may be configured to monitor for a plurality of differentcomponents of the air. For example, the flow device may be configured tomonitor for all of the components listed above and to generate aparticle profile for one or more components (e.g., individually) thatmay be present in the air.

Referring now to FIG. 6, an example flow device with a fluid senor 20and a fluid composition sensor 22 in the same housing in accordance withan example embodiment of the present disclosure is schematicallyillustrated. It should be understood that configurations, includingconfigurations of the fluid flow path, the overall shape and/or size ofthe flow device, and/or the like may vary in accordance with certainembodiments. As shown, the flow device may define a flow path from anintake end to an output end, such that at least a portion of the airthat reaches the fluid composition sensor 22 has passed through thefluid sensor 20 first. In some embodiments, the fluid sensor 20 and thefluid sensor 22 may share one or more common components. For example,the same suction device (e.g., fan, vacuum pump, and/or the like) may beused to direct the fluid flow in the flow path instead of individualsuction devices for each sensor. Alternatively, the fluid sensor 20 andthe fluid composition sensor 22 may each have individual components,such as shown in FIGS. 4 and 5 displaying the components of eachindividual component. Additionally, as shown in FIG. 6, each sensor mayhave a dedicated processor (e.g., fluid sensor control electronics forthe fluid sensor 20 and fluid composition sensor control electronics forthe fluid composition sensor 22). In some embodiments, the flow devicemay have additional processors (e.g., data management electronics)configured to carryout processes described herein.

In some embodiments, the one or more particle profiles may include atleast one of particle images, particle size data, or particle type dataof the at least one component of the fluid (e.g., at least one particlecomponent of air). In some embodiments, the one or more particleprofiles may include at least one of a holographic image reconstruction.In some embodiments, a particle profile generated by the flow device maybe based on a comparison of one or more partial image frames with one ormore reference image frames of one or more potential components of thefluid. In some embodiments, the reference image(s) may be received fromthe image database 28. In some embodiments, the fluid composition sensor22 may be configured to return to the unpowered state after one or moreparticle profiles have been generated. In such an embodiment, the fluidsensor 20 may continue to monitor the fluid even after the fluidcomposition sensor 22 returns to an unpowered state.

As described above, FIG. 2 illustrates a flowchart of the operations ofa flow device, method, and system according to example embodiments ofthe invention. It will be understood that each block of the flowchart,and combinations of blocks in the flowchart, may be implemented byvarious means, such as hardware, firmware, processor, circuitry, and/orother devices associated with execution of software including one ormore computer program instructions. For example, one or more of theprocedures described above may be embodied by computer programinstructions. In this regard, the computer program instructions whichembody the procedures described above may be stored by the memory device16 of a software development test platform employing an embodiment ofthe present invention and executed by the processing circuitry 12, theprocessor 14 or the like of the software development test platform. Aswill be appreciated, any such computer program instructions may beloaded onto a computer or other programmable flow device (e.g.,hardware) to produce a machine, such that the resulting computer orother programmable flow device implements the functions specified in theflowchart blocks. These computer program instructions may also be storedin a computer-readable memory that may direct a computer or otherprogrammable flow device to function in a particular manner, such thatthe instructions stored in the computer-readable memory produce anarticle of manufacture the execution of which implements the functionspecified in the flowchart blocks. The computer program instructions mayalso be loaded onto a computer or other programmable flow device tocause a series of operations to be performed on the computer or otherprogrammable flow device to produce a computer-implemented process suchthat the instructions which execute on the computer or otherprogrammable flow device provide operations for implementing thefunctions specified in the flowchart blocks.

Accordingly, blocks of the flowchart support combinations of means forperforming the specified functions and combinations of operations forperforming the specified functions for performing the specifiedfunctions. It will also be understood that one or more blocks of theflowchart, and combinations of blocks in the flowchart, can beimplemented by special purpose hardware-based computer systems whichperform the specified functions, or combinations of special purposehardware and computer instructions.

In some embodiments, certain ones of the operations above may bemodified or further amplified. Furthermore, in some embodiments,additional optional operations may be included. Modifications,additions, or amplifications to the operations above may be performed inany order and in any combination.

Many modifications and other embodiments of the inventions set forthherein will come to mind to one skilled in the art to which theseinventions pertain having the benefit of the teachings presented in theforegoing descriptions and the associated drawings. Therefore, it is tobe understood that the inventions are not to be limited to the specificembodiments disclosed and that modifications and other embodiments areintended to be included within the scope of the appended claims.Moreover, although the foregoing descriptions and the associateddrawings describe example embodiments in the context of certain examplecombinations of elements and/or functions, it should be appreciated thatdifferent combinations of elements and/or functions may be provided byalternative embodiments without departing from the scope of the appendedclaims. In this regard, for example, different combinations of elementsand/or functions than those explicitly described above are alsocontemplated as may be set forth in some of the appended claims.Although specific terms are employed herein, they are used in a genericand descriptive sense only and not for purposes of limitation.

That which is claimed:
 1. A method for controlling a flow device, themethod comprising: monitoring, via a fluid sensor, signal pulsesreceived by the fluid sensor based upon a presence of one or moreparticles carried by fluid flowing through the fluid sensor; upondetermining that the signal pulses satisfy one or more particlecriteria, generating a control signal for an external device, whereinthe one or more particle criteria defines at least one of: a thresholdnumber of signal pulses indicative of the presence of one or moreparticles received by the fluid sensor or a threshold size of at leastone signal pulse received by the fluid sensor; based on the controlsignal, causing a fluid composition sensor to be powered; capturing, viathe fluid composition sensor, data relating to a fluid particlecomposition; and generating one or more particle profiles of at leastone component of the fluid based on the data captured by the fluidcomposition sensor.
 2. The method of claim 1, wherein the monitoring ofthe fluid sensor is continuous.
 3. The method of claim 1, wherein thefluid sensor is an optical scanner device.
 4. The method of claim 1,wherein the fluid sensor is an optical scanner device and the fluidcomposition sensor is a lens free microscope device.
 5. The method ofclaim 1, wherein the fluid sensor defines at least a portion of a fluidflow path, and wherein the fluid sensor and the fluid composition sensorare positioned along the fluid flow path such that the fluid flowsthrough the fluid sensor before reaching the fluid composition sensor.6. The method of claim 1, further comprising causing the fluidcomposition sensor to be powered off after the one or more particleprofiles have been generated.
 7. The method of claim 1, wherein the oneor more particle profiles comprises at least one of a holographic imagereconstruction or particle size data.
 8. The method of claim 1 furthercomprising determining an initial particle profile based on themonitoring by the fluid sensor.
 9. The method of claim 1, wherein eachof the one or more particle profiles comprises at least one of particleimages, particle size data, or particle type data of the at least onecomponent of the fluid.
 10. The method of claim 9, wherein each of theat least one component of the fluid comprises one or more of bacteria,viruses, pollen, spores, molds, biological particles, soot, inorganicparticles, and organic particles.
 11. The method of claim 1, whereingenerating the one or more particle profiles of at least one componentof the fluid based on the data captured by the fluid composition sensorcomprises comparing one or more partial image frames with one or morereference image frames of one or more potential components of the fluid.12. The method of claim 1, wherein the fluid sensor and the fluidcomposition sensor are contained in a housing.
 13. A flow device fordetecting fluid particle composition comprising: a fluid sensorconfigured to: monitor at least one particle characteristic of fluidflowing through the fluid sensor; and a processor configured to, upondetermining the at least one particle characteristic satisfies one ormore particle criteria, generate a control signal for an externaldevice, wherein the one or more particle criteria defines at least oneof: a threshold number of signal pulses indicative of a presence of oneor more particles received by the fluid sensor or a threshold size of atleast one signal pulse received by the fluid sensor; based on thecontrol signal, cause a fluid composition sensor to be powered; capture,via the fluid composition sensor, data relating to the fluid particlecomposition; and generate one or more particle profiles of at least onecomponent of the fluid based on the data captured by the fluidcomposition sensor.
 14. The flow device of claim 13, wherein themonitoring of the fluid sensor is continuous.
 15. The flow device ofclaim 13, wherein the fluid sensor is an optical scanner device.
 16. Theflow device of claim 13, wherein the fluid sensor is an optical scannerdevice and the fluid composition sensor is a lens free microscopedevice.
 17. The flow device of claim 13, wherein the fluid is configuredto flow along a fluid flow path, and wherein the fluid sensor and thefluid composition sensor are positioned along the fluid flow path suchthat the fluid flows through the fluid sensor before reaching the fluidcomposition sensor.
 18. The flow device of claim 13, wherein each of theat least one component of the fluid comprises one or more of bacteria,viruses, pollen, spores, molds, biological particles, soot, inorganicparticles, and organic particles.
 19. A system for determining fluidparticle composition flowing through a path comprising: a fluid sensorconfigured to monitor at least one particle characteristic of a fluidflowing through the fluid sensor and along the path; a fluid compositionsensor configured to capture data relating to at least one particlecharacteristic of the fluid flowing along the path, wherein the fluidcomposition sensor is located downstream of the fluid sensor along thepath, wherein the fluid composition sensor remains unpowered until aparticle criteria is satisfied by the fluid flowing through the fluidsensor, and at least one processor configured to generate one or moreparticle profiles of at least one component of the fluid based on thedata captured by the fluid composition sensor.
 20. The system of claim19, wherein the monitoring of the fluid sensor is continuous.
 21. Thesystem of claim 19, wherein the fluid sensor is an optical scannerdevice and the fluid composition sensor is a lens free microscopedevice.
 22. The system of claim 19 wherein the fluid composition sensoris further configured to be powered off after the one or more particleprofiles have been generated.
 23. The system of claim 19, wherein eachof the at least one component of the fluid comprises one or more ofbacteria, viruses, pollen, spores, molds, biological particles, soot,inorganic particles, and organic particles.
 24. The system of claim 19,wherein the fluid sensor and the fluid composition sensor are containedin a housing.